变频器节能原理（Energy saving principle of frequency converter）.docVIP

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变频器节能原理（Energy saving principle of frequency converter）.doc

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变频器节能原理（Energy saving principle of frequency converter）

变频器节能原理（Energy saving principle of frequency converter） Always listen to other people say that the inverter can save electricity, said many people also accepted, but has not been able to understand why the inverter can save electricity, but also can save much, is the province of high frequency or low frequency province? And there are the following questions: 1, if the two motor work in power as like as two peas 50HZ, a frequency converter, a not at the same time, speed and torque in the rated state of the motor, so the inverter can save electricity? How much can you save? 2, if the torque of these two motors did not reach the rated torque status of the motor (frequency, speed is still the same as 50HZ), how much power can the inverter save? 3, the same conditions, how much can be saved under no-load conditions, which of these three states are more? Answer: inverter can save electricity, this is an indelible fact, in some cases can save more than 40%, but some cases will be more than without frequency converter waste! The frequency converter is to achieve energy-saving light load step-down, drag torque due to load speed has not changed much, even lower voltage, there will not be many, so energy saving is very weak, but in the wind machine environment is different, when need less air time, reduces the speed of motor, we know that the 1.7 party fan the energy with speed is proportional to, so the motor torque will decline sharply, the energy-saving effect is obvious. If we use the oil well, we will waste a lot of electricity because of the use of the braking resistor at the end of the trip, but waste more electricity. Of course, if the environment requires speed regulation, inverter energy saving effect is still obvious. Without speed regulation, frequency converter will not save electricity, it can only improve power factor. 1, if the two motor work in power as like as two peas 50HZ, a frequency converter, a not at the same time, speed and torque in the rated state of